Transformer



June 18, 1957 s. F. BARN'ETT TRANSFORMER Filed Aug. 2, 1955 25 2t W8 7 ffm/8 lll 7 M" 2a" u` 2 f u E /ff im l 2a 2 f2 2 ,.lllllh a Q/ 2L 4 `\4 fw V /t-I @I 5' 26 6 HE. 6 '5 6 .H2/5,2:

United States Patent O TRANSFORMER Stanley Frederick Barnett, Romford, England, assignor to The Plessey Company Limited, Ilford, England, a British company Application August 2, 1955, Serial No. 525,854

1 Claim. (Cl. 336-210) This invention relates to transformers.

The conventional method of holding laminations in face to face relationship is to use clamp plates or brackets which are adapted to be bolted to a chassis or the like. This arrangement adds to the cost of production.

It has also been proposed to bolt a transformer direct to a chassis or the like without the use of clamp plates or brackets. A disadvantage of this construction is the necessity of having to place the transformer horizontally in the chassis thereby occupying valuable space which is a prime factor in the mounting of components for a radio or television.

An object of this invention is to provide a transformer in which the cost of production is reduced to a minimum and at the same time obviates the hereinbefore-mentioned disadvantages.

Another object of the invention is to provide a simple and efficient method of fitting a transformer to the chassis or the like.

A further object of this invention is to provide a method of mounting a terminal board on to the transformer without adding to the cost of production.

According to this invention the transformer has the combination of a number of threaded studs of constant diameter which are bent to angle of approximately 90, said studs have one limb passing through aligned holes in the transformer laminations in alternate directions the other limb of said studs extend parallel beyond the boundaries of the laminations and a nut screwed on to the limbs passing through the laminations co-operates with a portion of the turned over limb to clamp them together.

A feature of the invention is that a termin-al board may be secured to the studs at the opposite side to the side adapted to be secured to a chassis or the like.

The invention will now be described by way of example with reference to the accompanying drawings, in which:

Fig. 1 is an elevation of transformer mounted upon a chassis in accordance with the invention,

Fig. 2 is an end view, partly in section, of Fig. l, and

Patented June 18, 1957 ICC Fig. 3 is a top view shown partly in section and partly broken away for clarity.

Referring to the drawing- The transformer is constructed from a number of thin U-shaped laminations 1, said laminations are interleaved and clamped together in face to face relationship by means of a stud denoted generally by numeral 2 at the respective corners of said laminations 1.

Each stud is bent approximately to an angle of 90 and threaded at each end. One limb 2a of each stud 2 is inserted in a reverse direction through aligned apertures 3 at the corners of said laminations 1, whereby the studs 2 at opposite corners extend in alternate directions. The other limb 2b of each stud 2 extends parallel and beyond the outer edges of said laminations 1 at diagonally opposite corners.

The limbs 2b of the studs 2 each form an abutment so that when a nut 4 is `screwed on to the limb 2a the laminations are clamped between the nuts 4 and abutment portion of limb 2b as shown in Fig. 2.

The limbs 2b depending from the laminations shown in Fig. 1, are inserted through apertures in a chassis or bracket 5 and secured thereto by nuts 6. A tag or like panel 7 is mounted over the upwardly extending limbs 2b shown in Fig. l and secured thereto by nuts 8.

From the foregoing description it will be appreciated that the laminations are clamped together and the transformer can be held in an upright manner thereby dispensing with the use of clamp plates or brackets as hitherto used.

I claim:

In a transformer built up from a plurality of interleaved laminations the combination of a number of threaded studs of constant diameter which are bent at an angle of 90, said studs constituting clamp members for the laminations and having one limb passing through aligned holes in said transformer laminations in alternate directions and a nut screwed on to the end of each limb, the limb of said studs extending parallel to and beyond the boundaries of the laminations forming an abutment whereby alternate studs are arranged on the two opposite sides of the laminations, and a terminal tag board connected to two alternate limbs of said ystuds extending beyond the boundaries of said laminations.

References Cited in the tile of this patent UNITED STATES PATENTS 1,552,702 Irish Sept. 8, 1925 1,988,734 Helgason Ian. 22, 1935 2,246,457 Schultz June 17, 1941 2,513,161 Friend June 27, 1950 2,668,250 Henderson Feb. 2, 1954 

